Implementation of device metrics emulation in render view.

content/renderer/render_view_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 757 matching lines @@
   virtual void InstrumentWillBeginFrame() OVERRIDE;
   virtual void InstrumentDidBeginFrame() OVERRIDE;
   virtual void InstrumentDidCancelFrame() OVERRIDE;
   virtual void InstrumentWillComposite() OVERRIDE;
   virtual bool AllowPartialSwap() const OVERRIDE;
 
  protected:
   explicit RenderViewImpl(RenderViewImplParams* params);
 
   void Initialize(RenderViewImplParams* params);
+  virtual void SetScreenMetricsEmulationParameters(bool enabled,
+      float device_scale_factor, float root_layer_scale) OVERRIDE;
 
   // Do not delete directly.  This class is reference counted.
   virtual ~RenderViewImpl();
 
  private:
   // For unit tests.
   friend class ExternalPopupMenuTest;
   friend class PepperDeviceTest;
   friend class RendererAccessibilityTest;
   friend class RenderViewTest;
@@ skipping 741 matching lines @@
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_